Metallurgical shaft furnace
OwnerRichard F. Obenchaininventor
Life of this patent
Estimating the term…
Abstract
A metallurgical shaft furnace for producing metal from a charge which enhances the preheating capacity of upwardly flowing gases in an upper preheating portion of the furnace, the upper portion being formed from concentric sections which increase in diameter from the uppermost section to the lowermost section of the preheating portion of the furnace. Troughs are formed where adjacent sections meet to form cooling rings around the upper portion, the rings projecting inwardly from the furnace wall. The lower portion comprises a melting portion having tuyeres, a hearth and tap means. Vertical cooling conduits may be provided in the lower section with conduits adjacent each tuyere terminating above the tuyere to prevent damage to the conduits.
Claims16
In a metallurgical shaft furnace adapted to the production of molten metal from a charge, the furnace comprising an upper preheating portion and a lower melting portion terminating at its bottom in a hearth and having tuyeres therein, the improvement wherein
- a. the upper portion is comprised of concentric sections, each said section increasing in diameter with respect to an adjacent section from the upper charging section thereof to the lower melting portion, the charging section having an exhaust means and charging means, and a water channel at the lower portion thereof and means for feeding water to said channel, with other of adjacent said sections having a water trough therearound on the outer surface, said trough extending inwardly to form a cooling ring, each said cooling ring increasing in diameter from the section below the charging section to said lower melting portion, said cooling rings providing support for a portion of the charge to the furnace so as to divert hot gases to the center of the furnace for preheating of the charge therein.
In a metallurgical shaft furnace adapted to the production of molten metal from a charge, the furnace comprising an upper preheating portion and a lower melting portion terminating at its bottom in a hearth and having tuyeres therein and suspension means intermediate the upper and lower portions for suspending said shaft furnace, the improvement wherein
- a. the upper portion is comprised of concentric sections, each said section increasing in diameter with respect to an adjacent section from the upper charging section thereof to the suspension means, the charging section having a central exhaust conduit therein and charging means surrounding the exhaust conduit and a water channel at the lower portion thereof and means for feeding water to said channel, with other of adjacent said sections having a water trough therearound on the outer surface, said trough extending inwardly to form a cooling ring, each said cooling ring increasing in diameter from the section below the charging section to said suspension means, said cooling rings providing support for a portion of the charge so as to divert hot gases to the center of the furnace for exhaust through the exhaust conduit.
Dependencies are inferred from the claim text.